Word Meaning

underground definition and meaning

n. The place or space beneath the surface of the ground; subterranean space.
a. Being below the surface of the ground; as, an underground story or apartment.
a. Done or occurring out of sight; secret.
adv. Beneath the surface of the earth.

Crossword clues for underground

- Beneath crushed resistance in WWII
- London’s Tube, the ...
- Secret
- Subterranean